Malleable metal product from cast-iron.



iron to cast the structure from an iron which nrran sirirras rnjnr cane.

EDGAR A. CUSTER, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE CUSTEF: SANDLESS CASTING COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CGR'POM" TION GE DELAWARE.

MALLEABLE METAL PRODUCT FROM CAST-IRON.

Specification of Letters Patent.

No Drawing. Application filed October 22, 1910, Serial It'o. 588,475. Renewed June 21, 1913, Serial No.

To all whom it may concern:

Be it known that I, EDGAR A. CUs'rnR, a citizen of the United States, residing in the city of Philadelphia, in the county of Philadelphia and State of Pennsylvania,.have invented certain new and useful Improvements in Malleable Metal Products from Cast- Iron, of which the following isa specificatlon.

The object of this invention is to produce a malleable structure, such as a casting from ordinary foundry iron comparatively high in silicon and low in combined carbon.

Heretofore it has been necessary in order to produce a malleable structure from cast is very lowin silicon and very high in combined carbon, and after cast-mg, to subject the structure to an annealing process. improved product is produced from ordinary molten foundry iron in Which a catalytic action is produced while the metal remains in its molten condition and before orduring the process of cooling to the point of setting. This catalytic action may be. caused to occur in a permanentmetal mold of any preferred or desired construct-ion. After the casting has been brought to the point of setting it is removed from the mold and allowed to cool under normal atmospheric conditions.

My improved product possesses all of the qualities of malleable iron produced in the usual manner. Said product is ductile, malleable and has the same tensile strength as malleable iron produced by the Well known process heretofore employed.

From the above description it Will be understood that I am enabled to produce a non-annealed malleable iron casting in a permanent mold which possesses those qualities which are characteristic of malleable iron, without the expense, labor and careful and skilful handling incidental to the production of such a casting by annealing. The

importance of eliminating this one annealing step in the treatment of malleable iron will be readily appreciated by those skilled in the art, inasmuch as I am enabled to produce a malleable iron casting with the same facility and by as simple and inexpensive methods as employed in the producing of an ordinary non-annealed casting, such as has been hitherto known. 7 I

I have found that in producing castings in accordance with my improved process the stability of the compound em loyed in the permanent metal mold is una ected by the pouring and setting of the casting herein. Thus it will be seen that no additional expense is encountered by reason of any harmful efiects produced on the mold itself.

I claim'as my invention:

1. A non-annealed malleable iron castinghaving the constituents of ordinary foundry iron comparatively high in silicon and low in combined carbon and possessing the duetility, malleability and the tensile strength of malleable iron.

2. A non-annealed iron casting produced in a permanent metal mold from ordinary foundry iron. having the ductility, malleability and tensile strength of malleable IIOIL 3. A non-annealed malleable iron casting produced from ordinary foundry iron comparatively high in silicon and low in combined carbon produced in a permanent metal mold by cat-a1 tic action having the duotility, malleabi ity and tensile strength of malleable iron.

4. A non-annealed malleable iron casting This specification signed and witnessed this 15th day of October, A. D. 1910.

EDGAR A. CUSTER.

Signed in the presence of- AMBROSE L. OSHEA,

N. A. SMITH. 

